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प्रश्न
Fill in the following blank with suitable words:
Neutral substances have a pH of ................
उत्तर
Neutral substances have a pH of 7.
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संबंधित प्रश्न
The indicators which turn red in acid solution are:
(a) turmeric and litmus
(b) phenolphthalein and methyl orange
(c) litmus and methyl orange
(d) phenolphthalein and litmus
What colour would the universal indicator show in an aqueous solution of sugar? Why?
How does an antacid work?
Name two common antacids.
The pH values of five solutions A, B, C, D and E are given below:
| A | 1 |
| B | 5 |
| C | 7 |
| D | 11 |
| E | 13 |
Which solution isneutral neutral.
Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.
What will be the action of solution A on litmus?
State whether the following statements are true or false. Correct the false statements.
Phenolphthalein is a natural indicator.
Turmeric and litmus are _________ acid-base indicators.
Neutral substances do not bring about any change in colour of indicators.
Using the knowledge of acids and bases, write a secret message with the help of baking soda and beet root. Explain how it works.
(Hint: Prepare baking soda solution in water. Use this solution to write the message on a sheet of white paper with a cotton bud. Rub a slice of fresh beetroot over the message.)
